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■ Review all proposed stormwater infrastructure to meet design standards for spacing,depth and <br /> catchment areas (appears to have ample catch basins,this can be reviewed with city staff and <br /> consulting engineer). <br /> ■ Overall,drainage and utility easements must adequately cover all stormwater basins and swale widths. <br /> Lots 1-5 block 3 need to have the drainage and utility easement widened to accomplish this. <br /> ■ Extend stub from sanitary manhole 206 to west property line to allow for future extensions. <br /> ■ Shift sanitary manhole 210 east to the right-of-way of Tyler Street, and extend sewer pipe to the <br /> northeast extent of the subject property with the addition of a sanitary manhole with a stub that <br /> extends north to the adjacent property line. <br /> ■ Shift sanitary manhole 202 and 201 east to the Tyler Street right-of-way. <br /> ■ Street signage plan is needed. <br /> ■ All surface flow swales must meet minimum 2%positive grade. <br /> ■ 2'freeboard is required from all proposed emergency overflow levels to low openings of proposed <br /> single-family homes. <br /> ■ Adjust driveway to the right on lot 5 block 3 so driveway does not overlap the catch basin. <br /> ■ Shift driveway west at lot 7 block 1 so driveway does not overlap the catch basin. <br /> ■ A double ring infiltrometer test is required for the dry basin to ensure stormwater modeling is <br /> accurate,adjust accordingly. <br /> ■ The proposed sanitary service line for the existing single-family home can't connect to sanitary <br /> manhole 204,must connect to main line.Also,this proposed sanitary sewer line must be in a <br /> proposed drainage and utility easement. <br /> ■ A wetland delineation is required for this site to determine accurate wetland boundaries.This will <br /> need to be completed during the growing season and reviewed by the TEP (technical evaluation <br /> panel) for approval. Once the wetland boundary is approved,the 45'wetland setback must be <br /> updated on the plat and placed within a drainage&utility easement. <br /> Elk River Municipal Utilities <br /> ■ The watermain at 190'/2 Avenue and Tyler Street needs to be extended North to connect with <br /> watermam at 191st Lane and Tyler Street to eliminate the dead-end watermain on 191st Avenue. <br /> ■ The dead-end watermain on 190th Ave will be considered a temporary dead-end with a fire hydrant <br /> for flushing. <br /> Please submit revised drawing(s) and other requested information,as indicated above,by March 15,2021. If <br /> city staff does not receive the requested information by this date,we will postpone your application. <br /> Please let me know if you have any questions. <br /> Sincerely, <br /> Chris Leeseberg, Senior Planner <br /> Ph: 763.635.1033 <br /> cleeseberg@E1kRiverMN.gov <br />